Improvement in the manufacture of white lead



0.JACOBI.

Making White Lead. No. 77,818. Patented May 12,1868

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- boiler, whence they are conducted through a pipe, E, into a vessel, F. This vesse to the (it-her through the holes in their sides.

but when they are comparatively pure, the damper d is opened and c clos 'dilnitrh gian s gaunt @ffirr.

Letters Patent No. 77,818, dated lllay 12, 1868.

IMPROVEMENT IN THE MANUFACTURE 0]? WHITE LEAD- tile Stlgtiinle ttit-tttb tn'iu ilgrst itiitrrs again rut mating pint at tip Sii'liit.

TO ALL WHOM IT MAY CONCERN:

I Be it known that T, 0m JACOBI, of Philadelphia, in the county of Philadelphia, and State of Pennsylvania, haveinvented a new and improved Apparatus for Making Garbonate of Lead; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to make and use the same, refer enee being bad to the accompanying drawings, forming part of this specification, in which} Figure 1 represents a side elevation partly in section of my improved apparatus.

Figure 2 is a'detail plan view of one of the boxes in which the lead to be oxidized is placed.

Similar letters of reference indicate corresponding parts.

This invention relates to a new apparatus for converting, by the action of aceticand carbonic acids, lead into carbonate of lead. v

The invention consists in combining with a converter, in which the lead is contained, a vinegar-melting apparatus and a'furnace, all acting in conjunction with each other; the heat of the furnace causing the vapors to arise from a vessel containing vinegar-mash, and to travel to the vinegar-apparatus, ivhcnce the acetic acid rises into the chamber or chambers that contain the lead, converting the lead or its outer faces into acetate of f lead. Carbonic acid isthen conducted into the converter to transform the acetate into carbonate of lead. The lead is held in small wooden boxes, which have perforated side's, so that the gases can freely pass through them.

The apparatus is so constructed that large quantities of load can at-o'ncelbc converted in it, althoughit is I of very simple construction, and can be cheaply built, while heretofore only very expensive apparatus could be used, whereby the manufacture of white lead was confined to large capitalists, people of small means not being able to erect the costly apparatus.

A, in the drawing, represents a stove or furnace of suitable construction. B is the pipe leadingfrom the furnace to the chimney G, to carry ofi the products of combustion.

D represents a boiler or vessel of suitable construction, shape, and size. It is towcontain vinegar-mash, and is placed upon the furnace, as shown, so that the heat of the furnace may cause the vapors to rise in the I F is filled with shavings or 0 acidify. The'acetic vapors thus produced rise other material which will cause the vapors from the mash t G, in which the vessel F stands, as is clearly.

through the perforated cover a of the vessel F into the converter shown in fig. I

The convcrcr is astructure built up of wood, or other suitable material, wood bein'g preferable. ,The wooden walls should be double, as shown, and the spaces between them should be filled with some nonheat conducting substance. In the converter is set up a series of small ivooden boxes, I I, which contain the lead.

Each of these boxes has perforated sides, as shown, and is open on top. The lead to he acted upon is cast in form of slotted plates, as in fig. 2, and is placed into the boxes in layers, as shown by section in fig. 1, and the'boxes I are setaround the vessel F, and above the same, so as to partly fill the converter. They are placed one upon the other, and side by side, so that the gases can circulate through all theboxes, by passing from one The acetic vapors rising from the vessel F, and circulating around the lead, convert the surfaces of thelcad into acetate of lead.

J represents a pipe extending from the pipe B to the converter.

dampers c and d respectively. As long as the products of combustion or The pipesB and J are provided with e impure, the damper d remains closed, ed, so that the carbonic acid can enter the converter to t-ransform the acetate of lead into carbonate of lead, ivhich is the article required.

K is an overflow-pipe, carrying away from the vessel F the superfluous vinegar. This pipe extends from the bottom or from the side of the vessel F to the outside of the converter.

By means of a number of pipes, E and J, the furnace can be connected with a series of converters .at'once. Through a hole, a, in the removable cover L of the converter, the gases can escape from the converter.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is--' 1 1. An apparatus for producing carbonate of lead, eonsisting of the furnace Aybeiler D, converter G, and of the perforated boxes II, or their equivalents, all made and operating substantially as herein shown and 4 described. i

. 2. The device 'set forth in the foregoing clause, in cembinatibn with the vinegar-apparatus F arranged within the converter,- as described. r

3'. The pipes 13 mild; injeombinntion witlitlie'eonverter G, all made and operating as deseribed, the pipes being provided with dampers c and d respectively, as specified. I i

' OTTO JAOOBI. Witnesses:

WM. F. IlIcNAMAItA,- ALEX. F. ROBERTS. 

